Standing Seam Metal Roofing
Alpine Sheet Metal Systems has been installing and fabricating Standing Seam Metal roofing throughout the Dallas Metro area for 20 years. Standing seam is probably the most recognizable profile of metal roofing for both commercial and residential projects. The popularity of standing seam has grown so much in recent decades that many people automatically assume that standing seam is implied by the term “metal roofing.” Standing seam provides a very contemporary, distinctive look, and is chosen to complement homes of all styles. The key, though, to choosing the right standing seam depends on the actual dimensions of the roof. More often than not, residential roofs are smaller, more compact, and more complex than commercial roofs. For this reason, it’s advisable to select a standing seam roof with a relatively small panel width – usually around 12 inches. Wider panels will present a more commercial look to the roof, obviously a condition to be avoided when selecting metal roof for a home. There are literally dozens of different “looks” and “feels” that can be achieved with metal roofing— from the traditional standing seam look, to the old-world tile look or the beauty of shakes, to the more agricultural corrugated look. The variety of attractive metal roofing profiles is one of the great advantages of the industry. No matter what the style or look of your home, there is almost certainly a metal roof system out there that will complement it perfectly! Unfortunately, the variety of profiles is sometimes one of the industry’s detriments as well because it can lead to improper products being used for less than ideal applications. The following section should help you make an informed choice about the product that will work best, both aesthetically and functionally, for your home or business premisis.
There are 2 fastening types, Alpine Roofing Construction can advice which is the more aporopriate type for your property needs, the environment it has to withstand and the overall visual style.
Through-fastened standing seam systems are less common and utilize a fastening “flange” that runs the length of the panels. The fasteners are driven through this flange and then concealed by the subsequent panel. So, although the fastener is concealed to the elements, fastening still occurs directly through the panels. These systems are more cost effective options, but since most quality standing seams used residentially are continuous panels—meaning the panels are custom formed to the length of the rafter—using these through-fastened panels is not recommended on longer rafter lengths. The reason is that the longer the panel, the more it will expand and contract, and the more likely to fatigue fasteners, “wallow out” fastener holes and also to oilcan. These through-fastened panels are a good option, however, for shorter runs such as porch accents or bay windows.
For longer runs, the better option is a standing seam system that utilizes a clip system. The clip should be manufactured from a similar metal as the standing seam itself, or from a metal like stainless steel that is not conducive to galvanic action between dissimilar metals. The clip is fastened to the roof deck so that the panels are allowed to “float.”
This helps to ensure that the system will maintain its water tightness much longer, and also its aesthetics, as oil canning will be less of a concern. For longer runs, or even for shorter runs downhill from longer roof runs, it is also recommended that a system with a higher rib is used. The rib is the portion of the standing seam that gives it its dimension, and is also the joint of the two adjacent panels. Higher ribs will give the panels more capability to carry water down the entire rafter length, and thus prevent water from spilling over the panels and possibly backing up under an overwhelmed rib or other flashing.
Sheet Metal Roofing
Sheet metal roofing is available in many different profiles, all going by different names. “5V” Crimp, “R” Panel, corrugated roofing, face-fastened panels, through-fastened panels, or screw down panels are some of the synonyms for the style of metal roofing that is encompassed under the umbrella term “sheet.” Metal sheet roofing is manufactured primarily from galvalume or galvanized steel in thicknesses that vary between 24 and 30 gauge. The defining characteristic of all sheet roofing is large panels (or sheets) of varying widths and lengths that overlap and have exposed fasteners. The fasteners are driven through the overlapping portions of the panels, as well as in other strategic locations and into the roof decking, purlin, or spaced sheathing below. A neoprene washer is located beneath the head of the fastener to ensure water tightness.
One common type of sheet roofing is the 5V Crimp pattern. It has five small V crimps per panel. Other corrugated patterns of sheet roofing give a more “wavy” look. The look of any of these products is sometimes construed as an agricultural or rural look. Sheet roofing can also give a historical look, particularly if used unpainted.
Sheet roofing can be installed painted or unpainted. Because sheet roofing is often chosen as a more economical type of metal roofing, the paints used on sheet metal roofing are often lesser quality. This saves even more money on the overall system. Generally, sheet roofing systems should be examined closely before being selected for residential projects looking for a lifetime roof. While most sheet roofing is still higher quality than many traditional roofing materials, it contrasts sharply with some of the more technologically-advanced metal roofing options available to homeowners who want to make lasting investments in their homes.
Sheet roofing is the most economical form of metal roofing. It is also one of the easier-to-install types of metal roofing. The disadvantages of sheet roofing are that it’s not as long lasting, both functionally and aesthetically, as some other types of metal roof systems.